New European Fire Testing Classification for Construction Products

Transcription

1 New European Fire Testing Classification for Construction Products THE BENCHMARK IN FIRE TESTING

2 EU Construction Products Directive The EU Construction Products Directive (CPD), is the basis of construction products regulations to be used in all member states. This Directive will require that all construction products be reclassified using the new set of common test methods. These products include all wall lining, flooring other fixed products such as linear pipe thermal insulation products electric cables. Construction products are currently controlled in National Building Regulations that typically used classifications often derived using the National fire test methods of each member state. E.g. British building regulations require classification using test methods described in the BS 476 test series. The CPD requires that all member states modify their regulations to incorporate the classification systems described in EN using the test methods quoted therein. EN was revised in 2007 to include classification requirements for linear thermal insulation product is, in 2010, being further revised to incorporate the electric cable fire performance classifications requirements Each member state is now able to continue to classify the products using the traditional methods alongside the new methods during a transition period. The traditional route will probably be unattractive to most suppliers, as the classification supported by traditional national tests will only be applicable in the host country, whilst those gained to the new test methods will be valid across all member states the European Economic Area (EEA) These test methods in some cases the classification system, are now been used extensively beyond the European Union both by countries producers wanting to trade these products with Europe by Countries wanting to establish or upgrade there own regulations without spending extensive research development budgets. FTT engineers have worked with CEN in the development of these test methods supply all equipment required for assessing the reaction to fire performance of construction products

3 How are Construction Products classified? The classification criteria test methods used to assess the reaction to fire performance of products covered by the CPD are described in EN : Fire classification of construction products building elements - Part 1: Classification using data from reaction to fire tests. The Stard splits the products into 3 sets (which will shortly be extended to 4 when the electric cable classification requirements are integrated in a 2010 draft). These are Construction product excluding flooring products Flooring products Linear pipes thermal Insulation products Electric Cables (in draft- see New European Cable Testing Classification document) Each of these sets has 5 classification levels A1, A2, B, C, D E a non performance determined class F the performance criteria the fire test methods to be used in assessing the performance are described in 3 tables (one for each set). Products in the non-flooring set are tested using the SBI test plus all other test methods except the EN ISO Flooring products are tested using the EN ISO instead of the SBI (EN 13823). Table 1 shows the test methods performance criteria for all construction products other than flooring products. Table 2 shows the test methods performance criteria for flooring products Table 3 shows the test methods performance criteria for linear pipe insulation products. Products in class A1 are mostly based on non-organic, materials classification into this group is gained using EN ISO 1716 Determination of the heat of combustion the EN ISO 1182 Non combustibility test. Classification into classes A2, B, C D which are the major classes inhabited by most products, other than those described above, require testing using either the EN or EN ISO , EN ISO ; Class E only requires testing to EN ISO The fire tests are listed below most are used to assess products in all sets whilst others are just used for one product set. EN 13823: Reaction to fire tests for building products excluding floorings exposed to thermal attack by a single burning item. EN ISO : Reaction to fire tests for building products Horizontal surface spread of flame for floor coverings. EN ISO : Reaction to fire tests for building products Ignitability of building products subjected to direct impingement of flame. EN ISO 1716: Reaction to fire tests for building products Determination of the heat of combustion. EN ISO 1182: Reaction to fire tests for building products Non combustibility test.

4 Single Burning Item EN Reaction to fire tests for building products excluding floorings exposed to thermal attack by a single burning item, the SBI. The specimen is mounted on a trolley that is positioned in a frame beneath an exhaust system. The reaction of the specimen to the burner is monitored instrumentally visually. Heat smoke release rates are calculated physical characteristics are assessed by observation. The parameters that are quantified in this test used within the classification criteria are; Total Heat Release (THR), Fire Growth Rate Index (FIGRA) Smoke Growth Rate index (SMOGRA). FTT supplies, installs, trains clients in the use of this apparatus. FTT can also supply any of the components to clients wishing to part design build their own equipment. The main components of the FTT SBI are: The Test Apparatus. Gas Analysis Instrumentation for Heat Release Measurement. Smoke Measurement System. Burner, Gas Train Controls. Data Acquisition Analysis Software.

5 Flooring Radiant Panel EN ISO Reaction to fire tests for building products Horizontal surface spread of flame for floor coverings. This test method evaluates the critical radiant flux below which flames no longer spread over the horizontal surface of a specimen. A smoke measuring system based on DIN is mounted on a separate frame in the exhaust stack is used to measure smoke generated in the test. The test is relevant to A2fl, Bfl, Cfl, Dfl.

6 Single-Flame Source Test EN ISO Reaction to fire tests for building products Ignitability of building products subjected to direct impingement of flame. This ignitibility method is based on the Kleinbrenner method determines the ignitibility of building products in the vertical orientation when subjected to impingement of a stard small flame.this test is relevant to classes B, C, D, E Bfl, Cfl, Dfl, Efl. The FTT Ignitability Apparatus is supplied as a complete easy-to-use system incorporating the following features: Combustion chamber with large front side doors for easy access toughened viewing panels. An extensively adjustable burner assembly Specimen holder capable of housing the specimens up to including 60 mm thick. A fully adjustable specimen support frame A digital anemometer/thermometer a stopwatch

7 Oxygen Bomb Calorimeter EN ISO 1182: Reaction to fire tests for building products Determination of the heat of combustion. This instrument determines the potential maximum total heat release of a product when completely burning regardless of its end use. The test is relevant to classes A1, A2, A1fl A2fl. The test specimen of a known mass is burned under stardised conditions, at constant volume in an atmosphere of oxygen, in the bomb calorimeter which is calibrated by combustion of benzoic acid. The calorific value determined under these conditions is calculated on the basis of the measured temperature rise while taking account of heat losses. The FTT Oxygen Bomb calorimeter consists of: Bomb calorimeter with embedded computer control, user-friendly interface, LCD graphics display, high accuracy / resolution PRTs, RS232 interface port for printer programming Oxygen bomb bucket (calorimeter vessel) Thermostatically controlled bath, circulator, cooler, pipette (2L) EN ISO 1716 sample preparation device, firing wire & cotton, cigarette making device Printer (optional)

8 Non-Combustibility Apparatus EN ISO 1182: Reaction to fire tests for building products Non combustibility test. This apparatus determines the non-combustibility performance, under specific conditions, of homogenous products substantial components of non homogeneous building products. The specimen is subjected to temperatures of 750 C in a vertical tube furnace. The specimen is observed for sustained flaming temperature rises furnace thermocouples are used to assess combustibility. The test is relevant to classes A1, A2, A1fl A2fl. The FTT non-combustibility apparatus is supplied with Special tube furnace Instrument unit features a temperature controller, an over-temperature alarm a power control which control the furnace temperature at 750 C NonComb Microsoft Windows analysis software Why FTT? FTT has been at the forefront of test instrumentation development in reaction to fire applications for over 20 years now sets the benchmark in this field of testing. FTT s production design facility in the UK continues to develop bench-scale instrumentation large-scale tests for a wide range of regulatory requirements. FTT offers a worldwide sales technical support service.

9 Table 1 - Classes of Reaction to Fire Performance for Construction Products Excluding Floorings CLASS TEST METHODS CLASSIFICATION CRITERIA ADDITIONAL CLASSIFICATION A1 EN ISO 1182 (1) EN ISO 1716 T 30 C; m 50%; tf = 0 (i.e. no sustained flaming ) - PCS 2.0 MJ/kg (1) PCS 2.0 MJ/kg (2) (2a) PCS 1.4 MJ/m 2 (3) PCS 2.0 MJ/kg (4) - A2 EN ISO 1182 (1) or EN ISO 1716 EN B EN EN ISO Exposure = 30s T 50 C; m 50%; tf 20s PCS 3.0 MJ/kg (1) PCS 4.0 MJ/m 2 (2) (2a) PCS 4.0 MJ/m 2 (3) PCS 3.0 MJ/kg (4) FIGRA 120 W/s; LFS < edge of specimen; THR600s 7.5 MJ FIGRA 120 W/s; LFS < edge of specimen; THR600s 7.5 MJ Fs 150mm within 60s - - Smoke production (5) Smoke production (5) C EN FIGRA 250 W/s; LFS < edge of specimen; THR600s 15 MJ Smoke production (5) Fs 150mm within 60s D EN Exposure = 30s FIGRA 750 W/s Fs 150mm within 60s Smoke production (5) E Exposure = 15s Fs 150mm within 20s Flaming droplets/particles (7) F No performance determined (1) For homogenous products substantial components of non-homogenous products. (2) For any external non-substantial component of non-homogenous products (2a) Alternatively. Any external non-substantial component having a PCS 2.0 MJ/m³, provided that the product satisfies the following criteria of EN 13823: FIGRA 20 W/s, LFS < edge of specimen THR600s 4.0 MJ s1 d0 (3) For any internal non-substantial component of non-homogenous products (4) For the product as a whole (5) In the last phase of the development of the test procedure, modifications of the smoke measurement system have been introduced, the effect of which needs further investigation. This may result in a modification of the limit values /or parameters for the evaluation of the smoke production. s1 = SMOGRA 30m²/s² TSP600s 50m²; s2 = SMOGRA 180m²/s² TSP600s 200m²; s3 = not s1 or s2 (6) d0 = No flaming droplets/particles in EN (SBI) within 600s; d1 = No flaming droplets/particles persisting longer than 10s in EN (SBI) within 600s; d2 = not d0 or d1; Ignition of the paper in EN ISO results in a d2 classification (7) Pass = no ignition of the paper (no classification); Fail = ignition of the paper (d2 classification) (8) Under conditions of surface flame attack, if appropriate to the end use application of the product, edge flame attack.

10 Table 2 - Classes of Reaction to Fire Performance for Floorings CLASS TEST METHODS CLASSIFICATION CRITERIA ADDITIONAL CLASSIFICATION A1fl EN ISO 1182 (1) EN ISO 1716 T 30 C; m 50%; tf = 0 (i.e. no sustained flaming ) - PCS 2.0 MJ/kg (1) PCS 2.0 MJ/kg (2) PCS 1.4 MJ/m 2 (3) PCS 2.0 MJ/kg (4) - A2fl EN ISO 1182 (1) or EN ISO 1716 T 50 C; m 50%; tf 20s PCS 3.0 MJ/kg (1) PCS 4.0 MJ/m 2 (2) PCS 4.0 MJ/m 2 (3) PCS 3.0 MJ/kg (4) - EN ISO (5) Critical flux (6) 8.0 kw/m 2 Bfl EN ISO (5) Critical flux (6) 8.0 kw/m 2 Smoke production (7) Smoke production (7) Exposure = 15s Cfl EN ISO (5) Exposure = 15s Fs 150mm within 20s Critical flux (6) 4.5 kw/m 2 Fs 150mmm within 20s Smoke production (7) Dfl EN ISO (5) Critical flux (6) 3,0 kw/m 2 Smoke production (7) Exposure = 15s Efl Exposure = 15s Fs 150mm within 20s Fs 150mm within 20s - Ffl No performance determined (1) For homogeneous products substantial components of non-homogeneous products (2) For any external non-substantial component of non-homogeneous products (3) For any internal non-substantial component of non-homogeneous products (4) For the product as a whole (5) Test duration = 30 minutes (6) Critical flux is defined as the radiant flux at which the flame extinguishes or the radiant flux after a test period of 30 minutes, whichever is lower (i.e. the flux corresponding with the furthest extent of spread of flame). (7) s1 = Smoke 750%.min; s2 = not s1 (8) Under conditions of surface flame attack, if appropriate to the end use application of the product, edge flame attack.

11 Table 3 - Classes of Reaction to Fire Performance for Linear Pipe Thermal Insulation Products CLASS TEST METHODS CLASSIFICATION CRITERIA ADDITIONAL CLASSIFICATION A1L EN ISO 1182 (1) EN ISO 1716 T 30 C; m 50%; tf = 0 (i.e. no sustained flaming ) - PCS 2.0 MJ/kg (1) PCS 2.0 MJ/kg (2) PCS 1.4 MJ/m 2 (3) PCS 2.0 MJ/kg (4) - A2L EN ISO 1182 (1) or EN ISO 1716 EN T 50 C; m 50%; tf 20s PCS 3.0 MJ/kg (1) PCS 4.0 MJ/m2 (2) PCS 4.0 MJ/m 2 (3) PCS 3.0 MJ/kg (4) FIGRA 270 W/s LFS < edge of specimen THR600s 7.5 MJ - - Smoke production (5) BL EN FIGRA 270 W/s LFS < edge of specimen THR600s 7.5 MJ Smoke production (e) Flaming droplets/particles (f) Exposure = 30 s Fs 150mm within 60s CL EN FIGRA 460 W/s LFS < edge of specimen THR600s 15 MJ Smoke production (5) Exposure = 30 s Fs 150mm within 20s DL EN FIGRA 2100 W/s THR600s 100 MJ Smoke production (5) Exposure = 30 s Fs 150mm within 60 s EL Fs 150mm within 20 s Exposure = 15 s FL No performance determined (1) For homogeneous products substantial components of non-homogeneous products (2) For any external non-substantial component of non-homogeneous products. (3) For any internal non-substantial component of non-homogeneous products. (4) For the product as a whole (5) s1 = SMOGRA 105 m 2 /s 2 TSP600s 250 m 2 ; s2 = SMOGRA 580 m 2 /s 2 TSP600s 1600 m 2 ; s3 = not s1 or s2 (6) d0 = No flaming droplets/particles in EN within 600 s; d1 = No flaming droplets/particles persisting longer than 10 s in EN within 600 s; d2 = not d0 or d1. Ignition of the paper in EN ISO results in a d2 classification. (7) Pass = no ignition of the paper (no classification); Fail = ignition of the paper (d2 classification). (8) Under conditions of surface flame attack, if appropriate to the end use application of the product, edge flame

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